// run: $exec < input
#include <iostream>
#include <iomanip>

int a, v1, v2;

int main()
{
	std::ios_base::sync_with_stdio(false);
	while (std::cin >> a >> v1 >> v2) {
		if (!a) {
			std::cout << "0\n";
			continue;
		}
		if (v1 <= v2) {
			std::cout<< "Infinity\n";
			continue;
		}
		long double tmp = (long double)a * v1 / (long double)(v1 * v1 - v2 * v2);
		std::cout << std::fixed << std::setprecision(15) << tmp << "\n";
	}
}

